FR2703824A1 - Multipolar limiter circuit breaker with electrodynamic repulsion. - Google Patents
Multipolar limiter circuit breaker with electrodynamic repulsion. Download PDFInfo
- Publication number
- FR2703824A1 FR2703824A1 FR9304298A FR9304298A FR2703824A1 FR 2703824 A1 FR2703824 A1 FR 2703824A1 FR 9304298 A FR9304298 A FR 9304298A FR 9304298 A FR9304298 A FR 9304298A FR 2703824 A1 FR2703824 A1 FR 2703824A1
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- France
- Prior art keywords
- contact
- bar
- circuit breaker
- movable contact
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
- H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2066—Fork-shaped bridge; Two transversally connected contact arms bridging two fixed contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
- H01H1/225—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member the supporting member being pivotable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
- H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
- H01H2001/223—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member using a torsion spring
Abstract
Le ressort (90) comporte un organe palpeur (94) coopérant à glissement avec une surface d'appui 80a du contact mobile (22) pour modifier le point d'application (103) de la force de pression P dans la deuxième position active de répulsion, entraînant une diminution du couple de rappel avant l'intervention du mécanisme. Le contact mobile (22) est conformé en fourche en étant articulé sur un axe (84) excentré et parallèle à l'axe de rotation du barreau (70). Le ressort (90) en spirale est monté flottant dans l'évidement (92) du barreau (70), et comprend deux enroulements (90a), (90b) hélicoïdaux de fil métallique.The spring (90) comprises a feeler member (94) slidingly cooperating with a bearing surface 80a of the movable contact (22) to modify the point of application (103) of the pressure force P in the second active position of repulsion, resulting in a reduction in the return torque before the mechanism intervenes. The movable contact (22) is shaped like a fork by being articulated on an axis (84) eccentric and parallel to the axis of rotation of the bar (70). The spiral spring (90) is mounted floating in the recess (92) of the bar (70), and comprises two helical windings (90a), (90b) of wire.
Description
DISJONCTEUR LIMTEUR MULTIPOLAIRE A REPULSIONMULTIPOLAR PULSE CIRCUIT BREAKER
ELECTRODYNAMIQUEELECTRODYNAMICS
L'invention est relative à un disjoncteur limiteur multipolaire à boîtier isolant moulé, renfermant: un dispositif interrupteur de courant ayant par pôle des éléments de contacts séparables, à répulsion électrodynamique, et au moins une chambre d'extinction d'arc, un mécanisme de commande à genouillère associée à un ressort d'embiellage, et à un dispositif de déclenchement, un barreau de commutation en matériau isolant servant de support aux contacts mobiles de l'ensemble des pôles, ledit barreau étant accouplé mécaniquement à la genouillère pour être déplacé par le mécanisme entre la position de fermeture, et la position d'ouverture des contacts, une manette accouplée au mécanisme en traversant une lumière de passage dans la face avant du boîtier, le contact mobile de chaque pôle étant formé par un bras de contact articulé sur un axe solidaire du barreau, ledit contact mobile étant déplaçable par répulsion électrodynamique à partir d'une première position de repos vers une deuxième position active, et des moyens élastiques comprenant un ressort logé dans un évidement du barreau pour assurer la pression de contact et pour ralentir la retombée du contact mobile vers la The invention relates to a multipole limiting circuit breaker with molded insulating casing, containing: a current interrupting device having, by pole, separable contact elements, with electrodynamic repulsion, and at least one arc extinguishing chamber, a mechanism for toggle control associated with a connecting rod spring, and to a triggering device, a switching bar made of insulating material serving as support for the movable contacts of all the poles, said bar being mechanically coupled to the toggle to be moved by the mechanism between the closed position and the open position of the contacts, a lever coupled to the mechanism by crossing a passage light in the front face of the housing, the movable contact of each pole being formed by a contact arm articulated on an axis integral with the bar, said movable contact being displaceable by electrodynamic repulsion from a prem 1st rest position to a second active position, and elastic means comprising a spring housed in a recess of the bar to ensure the contact pressure and to slow down the fallout of the movable contact towards the
première position de repos.first rest position.
Dans ce premier type de disjoncteur limiteur, l'apparition d'un courant de court-circuit provoque dans une première phase l'ouverture rapide, par répulsion électrodynamique, des contacts du pôle en défaut, et dans une deuxième phase le déclenchement du mécanisme piloté par les moyens de déclenchement La rotation du barreau de commutation pour l'ouverture définitive des contacts intervient uniquement durant la deuxième phase après In this first type of limiting circuit breaker, the appearance of a short-circuit current causes in a first phase the rapid opening, by electrodynamic repulsion, of the contacts of the faulty pole, and in a second phase the triggering of the piloted mechanism by the triggering means The rotation of the switching bar for the final opening of the contacts occurs only during the second phase after
déverrouillage de levier de déclenchement par le verrou. release of release lever by latch.
Le barreau reste immobile pendant la première phase de répulsion électrodynamique. The bar remains stationary during the first phase of electrodynamic repulsion.
Seul, le bras de contact du pôle en défaut s'ouvre, les contacts des autres pôles restant fermés durant cette première phase Il est essentiel que la rotation du barreau pour la confirmation de l'ouverture du disjoncteur intervienne avant la retombée du bras de contact vers la position de fermeture Le défaut de coordination entre les deux phases est dû principalement au maintien du barreau en position de fermeture durant la première phase de répulsion et peut provoquer des battements des contacts et une usure prématurée du disjoncteur. Le document FR-A 2553 930 de la demanderesse appartient à un deuxième type de disjoncteur limiteur ayant un mécanisme réversible, dans lequel l'axe de rotation du barreau coïncide avec le point d'articulation de chaque bras de contact Le ressort de traction est Only the contact arm of the faulty pole opens, the contacts of the other poles remaining closed during this first phase. It is essential that the rotation of the bar for confirmation of the opening of the circuit breaker occurs before the fall of the contact arm. towards the closed position The lack of coordination between the two phases is mainly due to the bar being kept in the closed position during the first repulsion phase and can cause contact beating and premature wear of the circuit breaker. Document FR-A 2553 930 of the applicant belongs to a second type of limiting circuit breaker having a reversible mechanism, in which the axis of rotation of the bar coincides with the articulation point of each contact arm The tension spring is
ancré entre le contact mobile et le barreau. anchored between the movable contact and the bar.
Le bras de contact de chaque pôle coopère avec le dispositif à genouillère pour entraîner à rotation le barreau de commutation dans le sens d'ouverture après l'entrée en action des moyens de répulsion électrodynamique du pôle en défaut de manière à autoriser la séparation des contacts de tous les pôles avant le déverrouillage du levier de déclenchement The contact arm of each pole cooperates with the toggle device to rotate the switching rod in the opening direction after the actuation of the electrodynamic repulsion means of the faulty pole so as to allow contact separation of all the poles before unlocking the release lever
par le verrou.by the lock.
La réversibilité du mécanisme par rotation du barreau pendant la première phase d'ouverture électrodynamique accélère le temps de déclenchement pour confirmer l'ouverture définitive du disjoncteur La rotation du barreau avant l'intervention du déclencheur est rendue possible grâce à la déformation de la genouillère dont l'angle de The reversibility of the mechanism by rotation of the bar during the first phase of electrodynamic opening accelerates the tripping time to confirm the definitive opening of the circuit breaker The rotation of the bar before the intervention of the trigger is made possible thanks to the deformation of the toggle joint, the angle of
décalage des biellettes est compris en position de fermeture entre 10 et 20 degrés. offset rods is included in the closed position between 10 and 20 degrees.
L'invention se rapporte au premier type de disjoncteur limiteur, et a pour objet d'améliorer The invention relates to the first type of limiting circuit breaker, and aims to improve
le système anti-retombée du contact mobile en fin de course de répulsion. the anti-fallout system of the movable contact at the end of the repulsion stroke.
Le disjoncteur selon l'invention est caractérisé en ce que: l'axe du contact mobile est excentré et parallèle par rapport à l'axe de rotation du barreau, le ressort comporte un organe palpeur coopérant à glissement avec une surface d'appui du contact mobile pour modifier le point d'application de la force de pression P dans ladite deuxième position active, entraînant une diminution du couple de rappel avant The circuit breaker according to the invention is characterized in that: the axis of the movable contact is eccentric and parallel with respect to the axis of rotation of the bar, the spring comprises a feeler member cooperating with sliding with a contact bearing surface movable to modify the point of application of the pressure force P in said second active position, resulting in a reduction of the forward restoring torque
l'intervention du mécanisme.the intervention of the mechanism.
Cette diminution du couple de rappel permet de retarder avantageusement la retombée du This reduction in the return torque advantageously delays the fallout of the
contact mobile avant l'intervention du barreau suite au déclenchement du mécanisme. movable contact before the intervention of the bar following the triggering of the mechanism.
Selon un mode de réalisation de l'invention, le contact mobile est conformé en fourche dotée de deux bras de contact parallèles, et le ressort utilisé est un ressort en spirale monté flottant dans l'évidement du barreau. Le ressort en spirale comporte deux enroulements hélicoïdaux de fil métallique, disposés coaxialement dans l'évidement en étant interconnectés dans la zone centrale par une liaison élastique saillante constituant ledit palpeur, et comprenant deux brins d'extrémités en appui According to one embodiment of the invention, the movable contact is shaped like a fork provided with two parallel contact arms, and the spring used is a spiral spring mounted floating in the recess of the bar. The spiral spring comprises two helical windings of metal wire, arranged coaxially in the recess by being interconnected in the central zone by a projecting elastic connection constituting said feeler, and comprising two strands of ends in support
contre une paroi du barreau.against a wall of the bar.
La répartition de la pression de contact avec le ressort en spirale s'effectue au moyen de deux fentes d'équilibrage prévues sur la surface d'appui de l'âme du contact mobile en fourche. Chaque fente est dotée de surfaces d'accrochage pour bloquer temporairement le contact The distribution of the contact pressure with the spiral spring is effected by means of two balancing slots provided on the bearing surface of the core of the movable fork contact. Each slot has hooking surfaces to temporarily block contact
mobile dans la deuxième position active. mobile in the second active position.
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va Other advantages and characteristics will emerge more clearly from the description which follows.
suivre d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif, et représenté aux dossiers annexés, dans lesquels: la figure 1 est une vue schématique en coupe d'un disjoncteur selon l'invention, représenté en position de fermeture, la figure 2 est une vue en élévation du barreau de commutation équipé des contacts mobiles de l'ensemble des pôles, le barreau étant vu du côté des contacts fixes, la figure 3 représente le barreau de la figure 2, vu du côté opposé, la figure 4 montre une vue en coupe du barreau selon la ligne 4-4 de la figure 3, le contact mobile se trouvant dans une première position de repos, la figure 5 représente une vue partielle à l'échelle agrandie d'un pôle du barreau de la figure 3, la figure 6 est une vue identique de la figure 4, le contact mobile se trouvant dans une deuxième position active après répulsion électrodynamique, les figures 7 et 8 sont des vues identiques à la figure 1, respectivement au début et à la fin de la phase de répulsion électrodynamique, -la figure 9 montre une vue identique à la figure 1 lors d'une ouverture manuelle du disjoncteur. Sur la figure 1, un disjoncteur multipolaire 10 à boîtier 12 isolant moulé, comporte un module de coupure 14 par pôle, formé par une ampoule 16 monobloc en matière plastique moulée, et ayant une forme de parallélépipède rectangle L'ampoule 16 comprend une face avant 18 ayant un orifice 20 de passage du contact mobile 22, et le module de coupure 14 follow of an embodiment of the invention, given by way of nonlimiting example, and represented in the appended files, in which: FIG. 1 is a schematic sectional view of a circuit breaker according to the invention, represented by closed position, FIG. 2 is an elevation view of the switching rod fitted with the movable contacts of all the poles, the rod being seen from the side of the fixed contacts, FIG. 3 represents the rod of FIG. 2, seen from the opposite side, Figure 4 shows a sectional view of the bar along line 4-4 of Figure 3, the movable contact being in a first rest position, Figure 5 shows a partial view on an enlarged scale of a pole of the bar of FIG. 3, FIG. 6 is an identical view of FIG. 4, the movable contact being in a second active position after electrodynamic repulsion, FIGS. 7 and 8 are views identical to FIG. 1, respectively in the beginning and at the end of the electrodynamic repulsion phase, FIG. 9 shows a view identical to FIG. 1 during manual opening of the circuit breaker. In FIG. 1, a multipolar circuit breaker 10 with molded insulating housing 12, comprises a breaking module 14 per pole, formed by a one-piece bulb 16 made of molded plastic, and having a shape of a rectangular parallelepiped The bulb 16 comprises a front face 18 having an opening 20 for passage of the movable contact 22, and the cut-off module 14
comprend un dispositif à répulsion électrodynamique des contacts. includes a device for electrodynamic repulsion of contacts.
A l'intérieur de l'ampoule 16, se trouvent deux contacts fixes 24, 26 reliés respectivement par des conducteurs 28, 30 de liaison à une première plage 32 d'une borne de raccordement 34, et à une deuxième plage 36 destinée à être connectée par une vis 38 à une troisième Inside the bulb 16, there are two fixed contacts 24, 26 connected respectively by conductors 28, 30 for connection to a first pad 32 of a connection terminal 34, and to a second pad 36 intended to be connected by a screw 38 to a third
plage de contact 40 d'un dispositif de déclenchement 42. contact pad 40 of a trip device 42.
Le dispositif de déclenchement 42 comporte un déclencheur magnétothermique 44 équipé à l'opposé de la plage 40, d'une quatrième plage de contact 46 faisant partie de l'autre borne 48 de raccordement du pôle Le déclencheur 44 est inséré électriquement en série dans le The tripping device 42 comprises a thermomagnetic trip device 44 fitted opposite the pad 40, with a fourth contact pad 46 forming part of the other terminal 48 for connection of the pole The trigger 44 is electrically inserted in series in the
pôle avec les contacts 22, 24, 26 du module de coupure 14. pole with the contacts 22, 24, 26 of the breaking module 14.
Le dispositif de déclenchement 42 comprend de plus une barre de déclenchement 50 montée à rotation limitée entre une position armée et une position déclenchée en fonction de la position de l'organe d'actionnement du déclencheur 44, par exemple la bilame 52 ou la palette 54 La barre 50 rotative est déplacée vers la position déclenchée dès que le courant circulant dans le pôle dépasse un seuil prédéterminé La barre de déclenchement 50 coopère d'autre part avec un verrou 56 d'accrochage d'un mécanisme 58 de commande à genouillère The triggering device 42 further comprises a trigger bar 50 mounted with limited rotation between an armed position and a triggered position as a function of the position of the actuating member of the trigger 44, for example the bimetallic strip 52 or the pallet 54 The rotary bar 50 is moved to the triggered position as soon as the current flowing in the pole exceeds a predetermined threshold The trigger bar 50 cooperates on the other hand with a latch 56 for attaching a knee lever control mechanism 58
et à manette 62.and lever 62.
Le mécanisme 58 est commun à l'ensemble des pôles, et est logé à l'intérieur du boîtier 12, seule la manette 62 étant accessible de l'extérieur en traversant une lumière 64 ménagée The mechanism 58 is common to all the poles, and is housed inside the housing 12, only the handle 62 being accessible from the outside by passing through a lumen 64 provided
dans la face avant du boîtier 12, pour la commande manuelle du disjoncteur 10. in the front face of the housing 12, for manual control of the circuit breaker 10.
La biellette inférieure 66 de la genouillère 60 est accouplée à une protubérance 68 d'un barreau 70 de commutation servant de support aux contacts mobiles 22 de tous les pôles Le barreau 70 de commutation est réalisé en matériau isolant et s'étend parallèlement à la barre The lower link 66 of the toggle joint 60 is coupled to a protuberance 68 of a switching bar 70 serving as a support for the movable contacts 22 of all the poles The switching bar 70 is made of insulating material and extends parallel to the bar
de déclenchement 50 dans la direction transversale des pôles. trigger 50 in the transverse direction of the poles.
Une action de déverrouillage de la barre de déclenchement 50 sur le verrou 56 libère le mécanisme 58, lequel se désarme sous l'action de détente d'un ressort 72 d'embiellage, entraînant le déplacement par pivotement de la genouillère 60, et la rotation du barreau 70 vers la position d'ouverture des contacts 22, 24, 26 de tous les pôles L'ordre de déverrouillage du verrou 56 peut provenir du déclencheur 44 magnétothermique, ou d'un déclencheur auxiliaire, notamment à manque de tension MN, à émission de courant MX, différentiel, etc Chaque module de coupure 14 renferme deux chambres d'extinction d'arc, dont une seule 74 est représentée sur la figure 1, chaque chambre se trouvant en communication avec une An unlocking action of the trigger bar 50 on the latch 56 releases the mechanism 58, which disarms under the expansion action of a connecting rod spring 72, causing the pivoting movement of the toggle joint 60, and the rotation from the bar 70 to the open position of the contacts 22, 24, 26 of all the poles The order to unlock the latch 56 can come from the magnetothermal trip unit 44, or from an auxiliary trip unit, in particular with a lack of voltage MN, at emission of current MX, differential, etc. Each cut-off module 14 contains two arc extinction chambers, of which only one 74 is shown in FIG. 1, each chamber being in communication with a
ouverture ou canal 76 d'échappement des gaz de coupure vers l'extérieur de l'ampoule 16. opening or channel 76 for exhaust of the cut-off gases towards the exterior of the bulb 16.
Chaque chambre d'extinction d'arc 74 est formée par un empilage des tôles de désionisation Each arc extinguishing chamber 74 is formed by a stack of deionization sheets
à encoches en V orientées vers le contact mobile 22. with V-shaped notches oriented towards the movable contact 22.
Sur les figures 2 et 3, le barreau de commutation 70 d'un disjoncteur tripolaire est équipé de trois contacts mobiles 22 identiques, répartis à intervalles réguliers le long de la direction transversale du barreau 70 Chaque contact mobile 22 présente une forme de fourche à deux bras de contact 22 a, 22 b, parallèles, coopérant en position de fermeture avec les deux In FIGS. 2 and 3, the switching bar 70 of a three-pole circuit breaker is equipped with three identical movable contacts 22, distributed at regular intervals along the transverse direction of the bar 70 Each movable contact 22 has the shape of a fork with two contact arms 22 a, 22 b, parallel, cooperating in the closed position with the two
contacts fixes 24, 26.fixed contacts 24, 26.
L'intérieur de l'ampoule 16 de chaque module de coupure 14 est subdivisé par une paroi isolante intermédiaire en deux compartiments adjacents, dans lesquels pénètrent les deux bras 22 a, 22 b du contact mobile 22 en fourche à travers l'orifice 2 o, le contact mobile 22 se trouvant positionné à cheval sur la paroi lors de son pivotement entre les positions de fermeture et d'ouverture Le barreau 70 est guidé en rotation par des paliers (non The interior of the bulb 16 of each cut-off module 14 is subdivided by an intermediate insulating wall into two adjacent compartments, into which the two arms 22 a, 22 b of the movable contact 22 in forks penetrate through the orifice 2 o , the movable contact 22 being positioned astride the wall during its pivoting between the closed and open positions The bar 70 is guided in rotation by bearings (not
représentés) prévus dans l'ampoule 16 des différents modules de coupure 14. shown) provided in the bulb 16 of the different cut-off modules 14.
En référence aux figures 4 à 6, chaque contact mobile 22 en fourche comporte une base 80 commune de support des deux bras de contact 22 a, 22 b verticaux, de manière à former un U renversé La base 80 rectiligne s'étend dans la direction transversale du barreau 70, et est équipée dans la zone centrale d'une queue 82 de maintien dont l'extrémité libre est articulée sur un axe 84 horizontal solidaire du barreau 70 La queue 82 est située dans le plan médian de symétrie avec une orientation inverse par rapport aux deux bras de contact 22 a, 22 b élémentaires. L'axe 84 de chaque contact mobile 22 est logé avec jeu dans deux paliers 86, 88 alignés ménagés sur la face supérieure du barreau 70 L'axe 84 de contact est parallèle, et excentré With reference to FIGS. 4 to 6, each movable contact 22 in a fork comprises a base 80 common for supporting the two vertical contact arms 22 a, 22 b, so as to form an inverted U The straight base 80 extends in the direction transverse of the bar 70, and is equipped in the central area with a retaining tail 82 whose free end is articulated on a horizontal axis 84 integral with the bar 70 The tail 82 is located in the median plane of symmetry with an opposite orientation relative to the two elementary contact arms 22 a, 22 b. The axis 84 of each movable contact 22 is housed with play in two aligned bearings 86, 88 formed on the upper face of the bar 70 The contact axis 84 is parallel, and eccentric
par rapport à l'axe de rotation du barreau 70. relative to the axis of rotation of the bar 70.
Chaque contact mobile 22 coopère avec un ressort 90 en spirale situé dans un évidement 92 délimité par un cadre 93 rectangulaire du barreau 70 pour assurer la pression de contact en position de fermeture Le ressort 90 comprend deux enroulements hélicoïdaux 90 a, 90 b coaxiaux réalisés en fil métallique et interconnectés par une liaison élastique 94 intermédiaire, laquelle est traversée par la queue 82 en prenant appui sur la base 80 du contact mobile 22 La liaison élastique 94 du ressort 90 comprend deux brins de fil métallique, conformés selon une demi-spire jouant le rôle de palpeur, et ayant une partie Each movable contact 22 cooperates with a spiral spring 90 situated in a recess 92 delimited by a rectangular frame 93 of the bar 70 to ensure the contact pressure in the closed position. The spring 90 comprises two helical windings 90 a, 90 b coaxial made in metal wire and interconnected by an intermediate elastic link 94, which is crossed by the tail 82 while resting on the base 80 of the movable contact 22 The elastic link 94 of the spring 90 comprises two strands of metal wire, shaped according to a half-turn playing the role of feeler, and having a part
saillante 94 a incurvée vers le haut. protruding 94 curved upward.
Le palpeur de la liaison élastique 94 est positionné dans deux fentes 96, 98 en V prévues sur la surface d'appui 80 a de la base 80 pour assurer l'équilibrage de la pression de contact en position de fermeture des contacts 22, 24, 26 Les deux fentes 96, 98 sont symétriques par rapport au plan médian passant par la queue 82, et les deux brins d'extrémités 100, 102 des deux enroulements 90 a, 90 b sont plaqués en permanence contre la face supérieure interne The probe of the elastic connection 94 is positioned in two slots 96, 98 in V provided on the bearing surface 80 a of the base 80 to ensure the balancing of the contact pressure in the closed position of the contacts 22, 24, 26 The two slots 96, 98 are symmetrical with respect to the median plane passing through the tail 82, and the two ends strands 100, 102 of the two windings 90 a, 90 b are permanently pressed against the upper internal face
du cadre 93.of frame 93.
Le ressort 90 est monté flottant dans l'évidement 92 par rapport à l'axe du barreau 70 rotatif La coopération du ressort 90 avec l'âme 80 du contact mobile 22 en fourche constitue un dispositif de maintien temporaire du contact en fin de course de répulsion The spring 90 is mounted floating in the recess 92 relative to the axis of the rotary bar 70 The cooperation of the spring 90 with the core 80 of the movable contact 22 in the fork constitutes a device for temporarily maintaining the contact at the end of the travel repulsion
électrodynamique.electrodynamics.
Le fonctionnement d'un pôle du disjoncteur 10 à répulsion électrodynamique est le suivant: En position de fermeture représentée sur la figure 1, le contact mobile 22 en fourche se trouve en appui stable contre les contacts fixes 24, 26 correspondants La réaction symétrique des deux brins 100, 102 du ressort 90 en spirale sur le cadre 93 du barreau 70 assure l'équilibrage de la pression de contact sur les deux bras 90 a, 90 b grâce à l'action de poussée répartie de la liaison élastique 94 ou palpeur sur l'âme 80 La figure 4 montre la force de pression P qui s'exerce sur le contact mobile 22 lorsque ce dernier se trouve dans une première position de repos La ligne d'action de la force P est sensiblement perpendiculaire à la liaison électrique 94 du ressort 90, et sollicite le contact mobile 22 dans The operation of a pole of the circuit breaker 10 with electrodynamic repulsion is as follows: In the closed position shown in FIG. 1, the movable contact 22 in the fork is in stable support against the corresponding fixed contacts 24, 26 The symmetrical reaction of the two strands 100, 102 of the spring 90 in a spiral on the frame 93 of the bar 70 ensures the balancing of the contact pressure on the two arms 90 a, 90 b thanks to the distributed thrust action of the elastic connection 94 or feeler on the core 80 FIG. 4 shows the pressure force P which is exerted on the movable contact 22 when the latter is in a first rest position The line of action of the force P is substantially perpendicular to the electrical connection 94 of the spring 90, and requests the movable contact 22 in
le sens inverse des aiguilles d'une montre pour exercer la pression de contact. counterclockwise to exert contact pressure.
La manette 62 du mécanisme 58 se trouve dans la position de fermeture, en butée contre l'extrémité gauche de la lumière 64 Le mécanisme 58 à ressort 72 est armé, et le déclencheur 44 est inactif Le point d'application 103 de la force P se trouve sur le bord de The handle 62 of the mechanism 58 is in the closed position, in abutment against the left end of the light 64 The mechanism 58 with spring 72 is armed, and the trigger 44 is inactive The point of application 103 of the force P lies on the edge of
l'âme 80.soul 80.
Sur la figure 7, l'apparition d'un courant de court-circuit dans le pôle provoque un effet de répulsion électrodynamique des contacts, avec un déplacement rapide du contact mobile 22, lequel pivote autour de son axe 84, dans le sens des aiguilles d'une montre La répulsion électrodynamique assure une ouverture brusque des contacts du pôle en défaut, avant l'intervention mécanique du mécanisme 58 de commande Le ressort 72 et la genouillère 60 restent immobiles, ainsi que le barreau de commutation 70, dont la position correspond à celle de la figure 1 L'arc reste ancré entre le contact mobile 22 et la corne d'arc fixe 104,et In FIG. 7, the appearance of a short-circuit current in the pole causes an effect of electrodynamic repulsion of the contacts, with a rapid displacement of the movable contact 22, which pivots around its axis 84, in the direction of the needles of a watch Electrodynamic repulsion ensures abrupt opening of the contacts of the faulty pole, before the mechanical intervention of the control mechanism 58 The spring 72 and the toggle joint 60 remain stationary, as does the switching bar 70, the position of which corresponds to that of FIG. 1 The arc remains anchored between the movable contact 22 and the fixed arcing horn 104, and
est propulsé en direction des tôles de désionisation de la chambre d'extinction 74. is propelled towards the deionization plates of the extinguishing chamber 74.
En fin de course d'ouverture sur répulstion (figure 8), le contact mobile 22 est ouvert au maximum, et se trouve en butée contre la paroi de l'ampoule 16 L'arc est refroidi par les tôles de la chambre 74, et le déclencheur 44 commence à piloter la phase de déclenchement At the end of the opening repulsion stroke (FIG. 8), the movable contact 22 is opened to the maximum, and is in abutment against the wall of the bulb 16 The arc is cooled by the sheets of the chamber 74, and trigger 44 starts to pilot the trigger phase
du mécanisme 58 (voir flèches).of mechanism 58 (see arrows).
Après déclenchement du mécanisme 58 (non représenté sur les figures), le verrou 56 libère la genouillère 60 entraînant la détente du ressort 72, et la rotation du barreau 70 dans le After triggering of the mechanism 58 (not shown in the figures), the latch 56 releases the toggle joint 60 causing the spring 72 to relax, and the bar 70 to rotate in the
sens des aiguilles d'une montre, de manière à confirmer l'ouverture du contact mobile 22. clockwise, so as to confirm the opening of the movable contact 22.
Pendant les phases de répulsion électrodynamique représentées sur les figures 7 et 8, il est impératif que le contact mobile 22 ne se referme pas avant l'intervention du barreau 70 suite au déclenchement du mécanisme 58 Le retard de retombée du contact mobile 22 est obtenu grâce au déplacement du point d'application 103 de la force P qui s'exerce sur l'âme During the electrodynamic repulsion phases shown in FIGS. 7 and 8, it is imperative that the movable contact 22 does not close before the intervention of the bar 70 following the triggering of the mechanism 58 The fallout of the movable contact 22 is obtained by displacement of the point of application 103 of the force P exerted on the core
lors de la répulsion.during the repulsion.
Dans la position de répulsion de la figure 6, le glissement de la liaison élastique 94 vers l'intérieur des fentes d'équilibrage 96, 98 modifie l'emplacement du point d'application 103 de la force P exercée par le ressort 90 La ligne d'action de la force P passe au voisinage de l'axe 84 de pivotement du contact mobile 22, ce qui diminue notablement le couple de rappel vers la position de fermeture Cette diminution du couple de rappel permet de In the repulsion position of FIG. 6, the sliding of the elastic link 94 towards the inside of the balancing slots 96, 98 modifies the location of the point of application 103 of the force P exerted by the spring 90 The line of action of the force P passes in the vicinity of the axis 84 of pivoting of the movable contact 22, which significantly reduces the return torque towards the closed position This reduction in the return torque allows
retarder la retombée du contact mobile 22 avant l'intervention du barreau 70. delay the fallout of the movable contact 22 before the intervention of the bar 70.
Les fentes 96, 98 comportent avantageusement des surfaces d'accrochage conformées pour The slots 96, 98 advantageously comprise hooking surfaces shaped to
bloquer temporairement le contact mobile 22 dans la position de répulsion maximum. temporarily block the movable contact 22 in the maximum repulsion position.
La figure 9 montre une phase d'ouverture manuelle du disjoncteur 10 par l'actionnement de la manette 62 dans le sens de la flèche Le mécanisme 58 reste armé, et la rotation du barreau 70 provoque le déplacement du contact mobile 22 vers la position d'ouverture dès FIG. 9 shows a phase of manual opening of the circuit breaker 10 by actuation of the handle 62 in the direction of the arrow The mechanism 58 remains armed, and the rotation of the bar 70 causes the displacement of the movable contact 22 towards the position d opening
que la manette 62 a dépassé la position intermédiaire du point mort ouverture. that the lever 62 has exceeded the intermediate position of the opening dead center.
8 27038248 2703824
Il n'y a pas de répulsion électrodynamique des contacts, et le point d'application 103 de la There is no electrodynamic repulsion of the contacts, and the point of application 103 of the
force P du ressort 90 correspond à celui de la figure 4. force P of spring 90 corresponds to that of FIG. 4.
Il est clair que le ressort 90 en spirale peut être remplacé par tout autre type de ressort. It is clear that the spiral spring 90 can be replaced by any other type of spring.
Claims (5)
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9304298A FR2703824B1 (en) | 1993-04-07 | 1993-04-07 | Multipolar limiter circuit breaker with electrodynamic repulsion. |
| US08/216,051 US5469121A (en) | 1993-04-07 | 1994-03-21 | Multiple current-limiting circuit breaker with electrodynamic repulsion |
| EP94420094A EP0619593B1 (en) | 1993-04-07 | 1994-03-22 | Multipole current limiting circuit breaker with electrodynamic repulsion |
| ES94420094T ES2102171T3 (en) | 1993-04-07 | 1994-03-22 | ELECTRODYNAMIC REPULSION MULTIPOLAR LIMITING CIRCUIT BREAKER. |
| DE69402597T DE69402597T2 (en) | 1993-04-07 | 1994-03-22 | Multi-pole current limit switch with electrodynamic repulsion |
| JP06725694A JP3509923B2 (en) | 1993-04-07 | 1994-04-05 | Multi-limit current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9304298A FR2703824B1 (en) | 1993-04-07 | 1993-04-07 | Multipolar limiter circuit breaker with electrodynamic repulsion. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2703824A1 true FR2703824A1 (en) | 1994-10-14 |
| FR2703824B1 FR2703824B1 (en) | 1995-05-12 |
Family
ID=9445985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9304298A Expired - Fee Related FR2703824B1 (en) | 1993-04-07 | 1993-04-07 | Multipolar limiter circuit breaker with electrodynamic repulsion. |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5469121A (en) |
| EP (1) | EP0619593B1 (en) |
| JP (1) | JP3509923B2 (en) |
| DE (1) | DE69402597T2 (en) |
| ES (1) | ES2102171T3 (en) |
| FR (1) | FR2703824B1 (en) |
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- 1993-04-07 FR FR9304298A patent/FR2703824B1/en not_active Expired - Fee Related
-
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- 1994-03-21 US US08/216,051 patent/US5469121A/en not_active Expired - Fee Related
- 1994-03-22 ES ES94420094T patent/ES2102171T3/en not_active Expired - Lifetime
- 1994-03-22 DE DE69402597T patent/DE69402597T2/en not_active Expired - Fee Related
- 1994-03-22 EP EP94420094A patent/EP0619593B1/en not_active Expired - Lifetime
- 1994-04-05 JP JP06725694A patent/JP3509923B2/en not_active Expired - Lifetime
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| US4480242A (en) * | 1983-03-28 | 1984-10-30 | General Electric Company | Variable torque contact arm for electric circuit breakers |
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Also Published As
| Publication number | Publication date |
|---|---|
| JPH06325678A (en) | 1994-11-25 |
| EP0619593A1 (en) | 1994-10-12 |
| US5469121A (en) | 1995-11-21 |
| EP0619593B1 (en) | 1997-04-16 |
| ES2102171T3 (en) | 1997-07-16 |
| FR2703824B1 (en) | 1995-05-12 |
| JP3509923B2 (en) | 2004-03-22 |
| DE69402597D1 (en) | 1997-05-22 |
| DE69402597T2 (en) | 1997-10-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20121228 |